Pneumatic jack for motor-cars.



E. B. BLAKEY-a R. B. MOGOLLUM.

PNEUMATIG IAGK POB. MOTOR GARS.

APPLIOATIOI FILED 10V. 2D, 1913.

Patented 11.1111111915.4

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. To all when?. zt may concern:

, srATns PATENT onmcn is. BLAKE? AND nUFUs B. MecoLLuM, or KANSAS CITY, MISSOURI.

speemmemn f Letten retenu rNEuMATIc .Tacx non Moron-CARS.

Patented Map. 9, .11515.

Application `tiled November"20,k1 918. Serial No. 802,073.

Beit knownthat we, En am) B. Bunny and Rui-Us B'. MCGOLLUM, citizens of the United States, residing at Kansas Cityfm thecounty of .Jackson'and State of Missouri, haveinvented certain new and useful Improvements in Pneumatic Jacks for Motor-Cars, of .which the following is a specication.

This invention relatesto pneumatlc JacksA designed principally `for useI with motor an apparatus adapted tobe attached per. manently to the car and in readiness foroperation bysimply turning on a valve or, valves wheneverit is desired to jack the vehicle; A further object is to produceA a.pneu mati'cally operated apparatus by means of. which either a portion only of-the car,may be jacked. or the whole car may be elevated bodily ofi1 the ground. L v

The invention further comprises a peculiar form of pneumatic cylinder employed afor.

.each ofthe jacking units, in which cylinder.

a piston Withtheseobjects in Aview the invention consists in 'certain novel and peculiar' features of construction and organization as hereinafter described and claimed, -and in order thatit maybe fully runderstood reference is to be had to the"accompanying drawing, in which- .Figure having a novel telescoping action gear, of a motor. car showing the. applicationA of our improvements thereto. Fig.' 2, is a longitudinal section through one of`the jacks.

commv on' p Vof one of t e of one of the valves. section through the rearaxlea'djacent one Fi 3, isa .fragmentary sideview jacks equipped with aiconnection broken away. Fig. 4, is a-crosssection Fig. 5, 4is .a .vertical of the jacks,

of the latter in elevation. Fig. 6, is a horizontal section through one of the jacks.

Referring to the drawing, each jack comprises a cylinder 2 having an. inlet pipe 4 and an exhaust pipe 6, both of which pipes communicate through a .two-way valve 8 with a short -pipe '9. Ihel pipes 9l'ead' to a.- 'pe- 10, communicatlng with a com,Y pressed air storage tank 12. The pipe 10 is 7 Valso equipped with a. valve 14. Each of the cylinders 2 of thefrontjacks is provided ground;

, of the 4running f a part of the stufling finder to the front axle 18adjacbnt the steer`- ing knuckles, '-while the cylinders of the rear jacks are provided with bosses 20 recessed as shown. in Fig. 5 for embracing the housing 22surrounding the rear axle 23, Clamp- `ing brackets 24 are used to secure the bosses 2O'Yto said housing, said bosses beingl further provided with studs 26 through suitable openings in 'the ousing-to insure holding of .the cylinders -in position. f cars, and one obJect in vlew 1s to provide Within each cylinder operates a telescopingnpiston (see Figs. 2 andr 6) comprising a cylinder 28 and piston rod 30, *the com; bined length of which is suficient to jack the corres ending portion of the car off the he cylinder 28 and rod 30 each has a piston head suitably secured to its upper .end and comprising rings. 32 and disks 34 respectively rendered .tight fittingby means of suitable packing- 36.' The pis-- -.1-ton head carriedl -by the cylinder 28 fits the interior`r of the cylinder 2, while the other tight within the cyl- U80 piston headis tted air inder 28. Stuling boxes 38 and 40 lare prol vided at the lower vends `of the. cylinders 2 and 28 respectively,y to accommodate 4the vsliding action of such cylinder 'X28 and rod.

The clyinder 28 is provided with a plurality of side openings 42 near its lower end, and a collarA 44 is secured to the rodA '30 -far enough below strike the bottom of cylinder 28 to prevent vthe same from ever closing thel openings 42. Similarly a suitable collar 46 is secured to the cylinder 28- nea'r itsnpper end` to engage b'oX 1.38 and thereby prevent the pistonv head from closing the opening into the' pipe 6, while a flange of said cylinder 47 is formedfon the lower end of said cylindertolimit its rising rnovefm'ent by engaging the said stufling b oX to prevent closing of.' the opening into pipe 4." and showing a broken portion A foot piece 48vis carried by' the vlower end of each rod 30 and to the latter. is also fixed 4a .rod v50 extending upward alongside the roject'ing vertical the piston headof said rod to' cylinder 2 and through a guide block 5 2. A

latch bolt 54 is mounted in the block 52 and is adapted to b slipped over the top of the rod 50 after the jack has been fully extended and thereby hold the jack in operative posif;l tion regardless of any leakage of air past the pistons, 'it being understood that these rest rods 50 .of the cylinders are designed* for. use particularly when the machine is allowed to remain Jacked 'over night.

450 Fig. 2.

opened to admit airfrom the tank 12 into.

the pipes 9`andl through the open valves into the pipes 4 of the cylinders `to be operated. The pressure operates cylinders, lowering each cylinder28 until 1ts collar 46 is seated adjacent the opening into pipe 6. Next the piston headof each rodBO l is operated withinthe corresponding cylinn der 28, forcing the air within out through' the openings 42. This action of the rod will bring the foot'piece in Ycontact with the ground and thereafter the relative movement 2 5 of the pistonI rod and cylinders will cause the car or that portion thereof being jacked, to be lifted oli' the ground. In this -position the upper ends of the rods will lie beneath the level of the bolt 54. .The valve 14 is then closed and in the event that the Ycar is to be left in this position fora considerable length 'of time, the bolts may be turned into place over the rods so that the weight of the car will be brought upon the rest rods thus pre-.

' leakage of the air. When it is desired to unjack the cylinders, the bolts 54 are retracted and the appropriate valves are turned tol place the pipes 4 of the corresponding cylinders in communicationwith the 4exhaust openings 56, and pipes 6 in communication with Ithe pipes 9. The valve 14 is then again opened whereupon the cylinders 28 are raised by air entering from pipes a '6 into'cylinders 2, as soon as the openings 42-l are vbroughtA into communication with the cylinders 2,*the piston heads of rods 30 vwill be actuated to raise'the latter, the partscomn ing to rest in original position as shown in s From the foregoingit will be apparent that while wehave illustrated and described what we' now consider the 'preferred embodimentof the inventiom, obvious changes will 5% suggest .themselveato one sln'lledin the art,

and. we do not desire to be restricted to the exact details of construction shown but reserve the right to make all changes falling sed condition as the pistons of saidY venting reseating of the pistons through said'rst cylinder, and means carried by the niemeer.r

in the first cyflinder andvprovided with a pis-4 65 ton head engagmg the same, a rod extending through the second cylinderdand. provided with'a piston within the latten, a head se- A cured to the` lower end o f the rod and pro.-

videdV with a rod extending parallel with and externally of the first-named cylinder, 'a 1 block secured to the said irst-named cylint der,- through'which said last-named rod slidingly extends, and a latchbolt carried by said block and adapted to bevtted over said rod when the jack is fully extended.

2. In a pneumatic jack, the' combination .of a cylinder having 'compressed air inlet and outlet openings adjacentl its opposite ends 4"respectively, a second cylinder within 80` said first cylinder and spacedktherefrom, the inner end of said second cylinder being open, an annular piston headcarried by saidinner end, and bridging thespace between the cylinders, means Aconfining said piston head to 85 movement between said openings, said second cylinder beingjprovidedJ with openings communicating with said space between the cylinders when the latter are telescoped,4 and a rod provided with a piston operating 90 within said second cylinder under pressure transmitted through said lastenained openings and the inner end of said second cylinder respectively.

of a cylinder having' compressed air'inlet and outlet openings, a second cylinder pro-V vided with a piston rod operating within said first cylinder, a rod provided with 'a piston actuated within said second cylinder by means of pressure transmittedv 4through said openings, a foot piece secured to the exterior end of saidrod, a rod fixed to said foot piece and extended'upward ,alongside 105 latter for .engaging said secondnamed rod and maintainingsaid cylinders and piston 4rod in extended position after shutting olf the compressed air supply.

Inl testimony whereof, we aiiix our' signa- 110 tures, in the presence of two witnesses.

' EDWARD B. BLAKEY. RUFUS B., MGQOLLUM.` Witnesses: v

VHELEN C.: RoDcERs, K G. Y. Tnonrfn: 

